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/* $OpenBSD: k_concat.c,v 1.2 1997/12/09 07:57:20 art Exp $ */
/* $KTH: k_concat.c,v 1.5 1997/05/02 08:56:39 joda Exp $ */
/*
* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Kungliga Tekniska
* Högskolan and its contributors.
*
* 4. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb_locl.h"
int
k_concat (char *s, size_t len, ...)
{
int ret;
va_list args;
va_start(args, len);
ret = k_vconcat (s, len, args);
va_end(args);
return ret;
}
int
k_vconcat (char *s, size_t len, va_list args)
{
const char *a;
while ((a = va_arg(args, const char*))) {
size_t n = strlen (a);
if (n >= len)
return -1;
strncpy (s, a, n);
s += n;
len -= n;
}
*s = '\0';
return 0;
}
size_t
k_vmconcat (char **s, size_t max_len, va_list args)
{
const char *a;
char *p, *q;
size_t len = 0;
*s = NULL;
p = malloc(1);
if(p == NULL)
return 0;
*p = 0;
len = 1;
while ((a = va_arg(args, const char*))) {
size_t n = strlen (a);
if(max_len && len + n > max_len){
free(p);
p = NULL;
return 0;
}
q = realloc(p, len + n);
if(q == NULL){
free(p);
p = NULL;
return 0;
}
p = q;
len += n;
strcat(p, a);
}
*s = p;
return len;
}
size_t
k_mconcat (char **s, size_t max_len, ...)
{
int ret;
va_list args;
va_start(args, max_len);
ret = k_vmconcat (s, max_len, args);
va_end(args);
return ret;
}
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